The 150-kg block A shown is released from rest. If the masses of the pulleys and the cord are neglected and block B is 30-kg; Datum SA SB B What is the value of the upward force pulling B in N?
Q: 60.0 kg skier is moving down a snowy hill inclined at 5 degrees above the horizontal with an…
A: mass of skier (m) = 60 kg initial angle of inclined hill (θi) = 5oinitial acceleration = 0.4 ms2
Q: ball is thrown vertically from the ground with a velocity of 30 m/s. a. What time is required for…
A: We know that the first equation of motion is given as v=u+at where v is the final velocity u is…
Q: 2. a. Define displacement r, velocity v and acceleration a b. Use these parameters to derive a…
A: a.Displacement r is the shortest distance between the initial and final position. Velocity v is the…
Q: A lawn mower is pushed at a constant velocity of 0.76m/s. The person pushes horizontally forwards…
A: Given, v=0.76 m/sF=80 N
Q: Q20. An object is shot straight up from 10 m above ground level with an initial velocity of vo = 17…
A: Given:The initial height of the object: h=10 mThe initial velocity is given as: v0=17 m/s in the…
Q: An automobile starting from rest speeds up with constant acceleration of 4ft/s^2. a. What is the…
A: Given data: Initial velocity, u=0 m/s Acceleration, a=4 ft/s2
Q: in the figure m2=60g m1 = 40 g then the ..=acceleration a
A: Given: Mass of object: m1=40 [g]=0.04 [kg] Mass of object: m2=60 [g]=0.06 [kg] The acceleration…
Q: If you toss a ball upward with an initial speed v = 2m/s, it reaches a max height h without air…
A: Given data: Original initial velocity (v) = 2 m/s, vertically upward Maximum height = h New…
Q: A 4 kg bowling ball is dropped from a building, and accelerates down toward the earth at 9.8 m/s^2.…
A: Given data: A 4 kg bowling ball dropped from the building Acceleration = 9.8 m/s2, down towards the…
Q: A person is travelling at 60mph at a 45mph speed limit road. The person sees a reduced speed limit…
A: We know that 1 mile = 5280 ft; 1 hour = 3600 seconds.Thus,now, the driver was at a speed of 60 mph.…
Q: 6. Freight trains can produce only relatively small accelerations. a. What is the final velocity of…
A: 6)time (t)= 7 min=420 seconds initial velocity (u) = 4.50 m/s Acceleration (a)= 0.0450 m/s2
Q: A skater of mass m = 45.0 kg initially at rest starts sliding down a frictionless ramp that is at a…
A:
Q: A certain hawk can fly horizontally (i.e., not diving) at a maximum speed of 80.0 km/hr The hawk…
A: Initial speed of the jet, u = 80 km/hr = 80000 m3600 s=22.2 m/s Deceleration, a = 2.75 m/s2 Mass of…
Q: A car is driving along a circular track of diameter d = 0.75 km at a constant speed of v = 22 m/s.…
A:
a. What is the total acceleration of block B in m/s2 ?
b. What is the value of the resulting force in kg?
c. What is the value of the velocity in m/s after 4s?
Step by step
Solved in 3 steps with 1 images
- A street ball is dropped onto a hard floor from a height of 16.1 m and rebounds to a height of 1.34 m. a. Calculate its acceleration during contact with the floor if that contact lasts 0.0900 ms. b. What distance did the ball compress during its collision with the floor, assuming the floor is absolutely rigid.The trap-jaw ant, found throughout tropical South America, catches its prey by very rapidly closing its mandibles around its victim. Shown is the speed of one of its mandible jaws versus time in microseconds. a. What is the maximum acceleration of the ant’s mandible? b. The mass of a trap-jaw ant’s mandible has been estimated to be about 1.3 x 10-7 kg. Estimate the maximum force exerted by one mandible.4. Suppose a free-fall ride at an amusement park starts at rest and is in free fall. a. What is the velocitof the ride after 2.3 s? b. How far do people on the ride fall during the 2.3-s time period?
- P09C1. You observed a stone falling freely from a cliff. The time it took to fall is 4 s. How high is the cliff?7. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s?. Determine the time for the feather to fall to the surface of the moon. a. 2.29 s b. 1.29 s. c. 1.29 m d. 0.29 s. a C d
- Q1. A 2 kg bob moves along a circular path in the vertical plane. When the bob is at the highest point, the bob has a speed of 6 m/s. Determine the tension in the cord at this moment 2mQ. A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker's head comes to a stop from an initial velocity of 0.565 m/s in a distance of only 2.15 mm. a. Find the acceleration in m/s² b. Find the acceleration in multiples of g (g = 9.80 m/s2) This means that you want to determine how much bigger the acceleration you calculated in part a is compared to the acceleration due to gravity, c. Calculate the stopping time (in s).2. A jet plane has a takeoff speed of vtakeoff = 73 m/s and can move along the runway at an average acceleration of 2.4 m/s2. The runway is 1.2 km. Write out the 3 Kinetic equations. a. b. Write out the values of initial position, initial velocity, and acceleration. How many seconds will it take for the plane to reach takeoff speed? с. d. How far will the plane have to travel to get to takeoff speed? will the plane be able to get to take off before it gets to the end of the runway? е.
- anb wers the question. Place your answer in the blank 2 1. Which of the following is not a unit of velocity? A. kg/s B, km/s C. m/h D. m/s . Bernice can run 100 m in 15.2 s. Correct to one decimal place, what is her average velocity in m/s? A. 6.0 m/s B. 6.2 m/s C. 6.4 m/s D. 6.6 m/s 3. Which of the following is the formula for velocity? A. V dt B. V=d C. v=L D. v=- dtA block of ice slides down a ramp. For which height and base lengths is the acceleration the greatest?A. Height 4 m, base 12 m B. Height 3 m, base 6 mC. Height 2 m, base 5 m D. Height 1 m, base 3 mA ball is thrown straight upward from a height of 3.2 m with a velocity of 13.0 m/s. a. What is the maximum height the ball reaches? b. How long does it take the ball to reach the maximum height? c. What is the total time the ball is in the air? d. With what velocity does the ball impact the surface?